diff --git a/tests/phpunit/tests/formatting/urlencodeDeep.php b/tests/phpunit/tests/formatting/urlencodeDeep.php
index 7783f3a002b05..5d64f3554a583 100644
--- a/tests/phpunit/tests/formatting/urlencodeDeep.php
+++ b/tests/phpunit/tests/formatting/urlencodeDeep.php
@@ -1,10 +1,14 @@
 <?php
 
 /**
+ * Tests for urlencode_deep(), rawurlencode_deep(), and urldecode_deep().
+ *
  * @group formatting
  * @ticket 22300
  *
  * @covers ::urlencode_deep
+ * @covers ::rawurlencode_deep
+ * @covers ::urldecode_deep
  */
 class Tests_Formatting_UrlencodeDeep extends WP_UnitTestCase {
 
@@ -44,4 +48,23 @@ public function test_urlencode_deep_should_encode_all_values_in_array() {
 
 		$this->assertSame( $expected, urlencode_deep( $actual ) );
 	}
+
+	/**
+	 * Tests that rawurlencode_deep() encodes a single string.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_rawurlencode_deep_string() {
+		$this->assertSame( 'foo%20bar%26baz%3D1', rawurlencode_deep( 'foo bar&baz=1' ) );
+	}
+
+	/**
+	 * Tests that urldecode_deep() decodes a single string.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_urldecode_deep_string() {
+		$this->assertSame( 'foo bar&baz=1', urldecode_deep( 'foo+bar%26baz%3D1' ) );
+		$this->assertSame( 'foo bar', urldecode_deep( 'foo%20bar' ) );
+	}
 }